Collapsible brush



FIG. 1 is a front view of the collapsible brush, shown with the headretracted inside the housing;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is a front view of the collapsible brush, shown with the headextended outside the housing;

FIG. 9 is a rear view thereof;

FIG. 10 is a left side view thereof;

FIG. 11 is a right side view thereof;

FIG. 12 is a top view thereof;

FIG. 13 is a bottom view thereof; and,

FIG. 14 is a perspective view thereof.

The broken lines depict partially visible interior details of the bottomof the housing that form no part of the claimed design.

CLAIM The ornamental design for a collapsible brush, as shown, anddescribed.